Derivative Instruments (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Mar. 31, 2008
Derivative Instruments [Abstract]
Floating-rate subordinated note	$ 25,000,000		$ 25,000,000		$ 25,000,000
Interest rate swap's fair value included in other liabilities	(1,100,000)		(1,100,000)
Hedge ineffectiveness on the cash flow hedge			0
Variable rate on subordinated note			2.37%
Basis for determining variable rate on subordinated note			3-month LIBOR plus 200 basis points
Fixed rate on interest rate swap paid by Park	6.01%		6.01%
Fixed rate on the interest rate swap	4.01%		4.01%
Basis for determining variable rate on interest rate swap			4.01% fixed rate on the interest rate swap plus 200 basis points
Change in fair value of interest rate swap, net of taxes	155,000	(66,000)	348,000	(277,000)
Change in fair value of interest rate swap, taxes	83,000	(36,000)	187,000	(149,000)
Mortgage loan interest rate lock commitments outstanding	29,300,000		29,300,000
Fair value of the derivative instruments	378,000		378,000
Fair value of the swap liability	$ 200,000		$ 200,000